Ram ratio 1:1 or 4:3?

[LeaDxPainT]

I have a Asus P4B533-e, 2.4 northwood, pc-2700 ddr corsair xms and I would like to knowwhether it is better to set the ram ratio at 1:1 or 4:3. Thanks

 

[Duvie]

SEt it to 1:1...That pc2700 can likely go higher then 166fsb for 33mhz ddr anyways....If you hit the limit then drop to 4:3 if you want the cpu power versus the memory bandwidth...

Does that board also has a 3:4 ratio??? That would with pc2700 likely run out very fast and limit your oc if you left it on...


133fsb (533) 2.4ghz 4:3 200mhz ddr (PC1600)
166fsb (666) 2.98ghz 4:3 249mhz ddr (-PC2100)

133fsb (533) 2.4ghz 1:1 266mhz ddr (PC2100)
166fsb (533) 2.98ghz 1:1 333mhz ddr (PC2700)

133fsb (533) 2.4ghz 3:4 354mhz ddr (~PC2850)
150fsb (600) 2.7hgz 3:4 400mhz ddr (PC3200) possible with vdimm adjustments and lowered cas settings

If you have no 3:4 ratio then definitely stick with 1:1 as that corsair likely can get to 370mhz ddr at least and that would cover you to 185fsb and one massive oc on that chip...

 

[LeaDxPainT]

Thanks for all the info..unfortunatly I dont have 3:4

 

[oldfart]

There is a 3:4 available via a trick.
Set it 133 or above FSB 1:1.
Power it down
Set DS6 to ON. Power back up. Now 4:3 = 1:1 and 1:1 = 3:4.

 

[LeaDxPainT]

sweet deal, thanks a lot

 

[LeaDxPainT]

I was looking at the booklet and just want to double check...should the DSW1 SW5 be on alone (133 setting in the book) or the SW6? and do I have to do anyhting with the multiplier or agp ratio...thanks again.

 

[THUGSROOK]

all dipswitches should be off except dipswitch 6, for the 3:4 ratio above 132fsb.

 

[LeaDxPainT]

ok thanks